1 Corinthians 7:1-4Now regarding the questions you asked in your letter. Yes, it is good to abstain from sexual relations. But because there is so much sexual immorality, each man should have his own wife, and each woman should have her own husband.

The husband should fulfill his wife’s sexual needs, and the wife should fulfill her husband’s needs. The wife gives authority over her body to her husband, and the husband gives authority over his body to his wife.

1 Corinthians 7:1-4Now regarding the questions you asked in your letter. Yes, it is good to abstain from sexual relations. But because there is so much sexual immorality, each man should have his own wife, and each woman should have her own husband.

The husband should fulfill his wife’s sexual needs, and the wife should fulfill her husband’s needs. The wife gives authority over her body to her husband, and the husband gives authority over his body to his wife.

Fornication is carnal union between an unmarried man and an unmarried woman. It is gravely contrary to the dignity of persons and of human sexuality which is naturally ordered to the good of spouses and the generation and education of children. Moreover, it is a grave scandal when there is corruption of the young.

Notice how the passage PFIDC quotes says "The husband should fulfill his wife’s sexual needs, and the wife should fulfill her husband’s needs." That right there goes completely against what you're interpreting the passage as.

The passage, as I read it and how the word fornication is defined by the Catholic Church, is saying people should abstain from sex outside of marriage, not altogether.

This is one of those things that is very hard to understand and I don't claim to completely. Paul is speaking in a matter of eternity, a matter of what we (followed of Christ) are supposed to be and one day will be when we are one with the Father in heaven. Sex has 1 purpose; procreation. We are told to be fruitful and multiply so obviously sex is needed. Sex is also a gigantic doorway to immorality and Christ taught that it is better to cut off what makes you sin than to keep on sinning. In that way since the people of Corinth, to whom this letter was addressed, were rampant with sexual immorality Paul essentially told them it's best to 'cut off what makes them sin', ergo don't have sex. Since that is a rather absurd request to make of human beings (especially if we are to be fruitful and multiply) Paul says it's best to be married and monogamous.